Goran bought 6 CDs that were each the same price. Including sales tax, he paid a total of $78.60 . Each CD had a tax of $1.20 . What was the price of each CD before tax?

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)